<!DOCTYPE html>
<style>
    #scrollable-div {
        width: 300px;
        height: 200px;
        overflow: auto;
        border: 1px solid black;
        padding: 10px;
        font-size: 50px;
    }
</style>
<script src="include.js"></script>
<div id="scrollable-div">
    Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer nec odio. Praesent libero. Sed
    cursus ante dapibus diam. Sed nisi. Nulla quis sem at nibh elementum imperdiet. Duis sagittis
    ipsum. Praesent mauris. Fusce nec tellus sed augue semper porta. Mauris massa. Vestibulum
    lacinia arcu eget nulla. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per
    inceptos himenaeos.
</div>
<script>
    asyncTest(done => {
        const scrollable = document.getElementById("scrollable-div");
        scrollable.addEventListener("scroll", event => {
            println(`scroll event fired y=${scrollable.scrollTop}`);
            done();
        });
        scrollable.scrollTop = 100;
    });
</script>
